Tree-surgery implement.



F. B. MARVIN.

TREE SURGERY IMPLEMENT.

APPLICATION man ^PR.24. 191e.

Patented Jan. 1, 1918.

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FREDERICK B. MABVIN,`OF NEW YORK, N. Y.

TREE-SURGERY IMPLEMEN'YI.

Speoication ot Letters Patent.

Patented Jan. 1, 1918.

Application led April 24, 1916. Serial No. 93,039.

To all whom t may concern.'

Be it known that I, FREDERICK B. M ARVIN, a citizen of the UnitedStates, residing at New York city, in the county of New York and Stateof New York, have invented certain new and useful Improvements inTreethe movable parts of the device, the saidl members having novelfeatures of construction adapting them for eiiicient coperation with4each other and the proper perfomance.

of the implement in actual operation.

Another part of my invention consists in providing the handle memberwith a rest or purchase extension, notably a hook or crook, whereby tofacilitate certain operations to be performed by the implement, as forinstance, sawing od a tree limb or polishing the sawed surface. l

In -the accompanying drawing vin which my invention is fullyillustrated,

Figure 1 is aside elevation ofthe improved implement;

Fig. 2 is a front elevation thereof, the

hook-extension or crook being shown in section;

Fig. 3 is a'front elevation', on a larger scale, of the upper portion ofthe implement, and showing certain attachments in place; and, f

Fig. 4 is a top plan view.

In said drawings a is an elongated tubular handle member which has atone end the fork b and at the other adords a handle to the insidesurfaces thereof,I the two strips .being in side elevation formed as totheir proper. Stiening the members of this fork are the strips c criveted or otherwise secured a, and, it being remarked that the hook or.confine the upper end of the carrier.

crook proper preferably conforms to more than half of a circle, it ispreferable that the center around which the hook or crook is formedshall be substantially coincidentwith the longitudinal axis of thehandle proper of the member a. b, with so much of the strips c as are inimmediate contact therewith, form a guiding portion, as will. behereinafter explained, which extends parallel with the axis of thehandle proper of member a. In said handle proper of member a is a lon'tudinal slot g formed with offset notches at the ends thereof.

S'nugly fitting the handle'proper of member a is a tubular carrier t'havin a handle j projectingthrough the slot g an affording means formoving the carrier i longitudinally 'lhe members ofthe fork in'member a.The upper end of the carrier consist of elongated strips formingextensions of Athe carrier and each havin a flat straight portion kwhich bears against one v of the portions c and serves to guide and Thefree ends ofthe extensions are equipped with bearings Z'for a shaft m onwhich as a holder, between said bearings, is fixed a circular blade nhaving a serrated ed e and thus forming a saw.v The sawis ormed with acircular series of holes o with which engage the teeth on the periphery'of a pinionp secured on the upper end of a shaft g suitably journaled inthe carrier and extending therethrough and having means r at its lowerend for coupling it with a flexible shaft s which may be rotated from ansuitable motor. The saw blade n is su ciently greater in diameter thanthe hook or crook al so that when the carrier is elevated to its upwardllimit the periphery of the saw is for the greater portion thereofsheathed by the two sides of said hook or crook, as indicated by dottedlines in Fig. 1. The shaft m may have a threaded bore at one end toreceive the threaded spindle of-another tool, such as a tool forlsmoothing the sawed face of a tree limb, a boring tool, a tool forburring or reaming out the decayed cavities, and other devices; one ofthese-a tool for-smoothing olf the sawed surface ofa tree limb-is shown,the same being a disk u having an abrading 'face' o. In connection withthe tools used in this way it may be desired to steady the implement atits upper end against the tree while the tool is operating, wherefore Iprovide the removable arm w arranged in the sockets on the side of thecrook d.

The hook-extension of the implement preferably has the hook y,-Wherebyit may be temporarily hung up when not actually in use, as on the limbof a tree.

In using the implement, when a limb is Y to be saWed oil` thehook-extension, Which is serrated at a, is hooked over the limb so as toobtain a purchase. The blade n being now set in rotation by rotating theflexible shaft s and consequently shaft g and pinion p, the operator,holding the handle member a in one hand and grasping the handle y' withthe other, gradually raises the carrier z' in the handle to advance thesaw against and through the limb. This operation is greatly facilitated,as Will be obvious, because of the purchase adorded by thehookextension.

The manner of using the implement When one of the other tools, as fu, isin service has been already explained.

In this connection it should be noted that one of the im ortant featuresof the implement is the act that the carrier member may be moved backand forth in the handle member While the latter has a purchase againstthe Work. l

In order to sheath the saw blade n Within the hook-extension (dottedposition, Fig. l)

vthe carrier is elevated and then turned so that the handle j engages'inthe upper notch h.' f

Having thus fully described myinvention,

' what I claim as new and desire to secure by Letters Patent is.:-

1. In combination, an elongatedv handle member, the same having at oneend a liandle proper and in its other end-portion a rest-extensionadapted to bear against and ai'ord a purchase for the implement againstthe tree or the like being operated upon, a hand-moved carrier memberslidable in and longitudinally of the handle member, and having a handleadjacent the handle proper of the handle member and a train of movingparts arranged in the carrier member and including a tool h older.

2. In' combination, an elongated handle member, the same having at oneend a hanaannam dle proper and in its other end-portion a hook-extensionadapted to hook over and bear against the tree limb or the like beingoperated upon', a hand-moved carrier member .slidable in andlongitudinally of the handle member toward and from the hookextension,and having a handle adjacent the handle proper ,of the handle member anda train of moving parts arranged in the carrier member and including atool holder.

3. In combination, an elongated handle member, the same having at oneend a liandle proper and in its other end-portion a hook extensionadapted to hook over and bear against the tree limb or the like beingoperated upon, a hand-moved carrier member slidable in andlongitudinally of the handle member toward and from the hookextension,and having a handle adjacent the handle roper of the handle member and atrain o moving parts arranged in the carrier member and including a toolholder andI a blade, the latter being arranged in a plane substantiallycoincident with that of said hook-extension.

4. In combination, a handle member inrier member longitudinally slidablein and guided by said handle and having a guiding portion between and inguiding contact with the guiding arms of said forked portion of thehandle member, and a train of moving parts arranged in they carriermember and including a tool holder.

5. In combination, an elongated handle member having a forked guidingportion substantially parallel Iwith its longitudinal axis, said portionterminating in a resteXtension adapted to bear against and aiord apurchase for the implement against the tree or the like being operatedupon, a carrier member longitudinally slidable in said handle member andhaving a guiding portion between and in guiding contact with the arms ofsaid forked guiding portion ofv the handle member, and a train of movingparts arranged in the carrier member and,l

